FKIE_CVE-2022-20821

Vulnerability from fkie_nvd - Published: 2022-05-26 14:15 - Updated: 2025-10-28 13:59
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Summary
A vulnerability in the health check RPM of Cisco IOS XR Software could allow an unauthenticated, remote attacker to access the Redis instance that is running within the NOSi container. This vulnerability exists because the health check RPM opens TCP port 6379 by default upon activation. An attacker could exploit this vulnerability by connecting to the Redis instance on the open port. A successful exploit could allow the attacker to write to the Redis in-memory database, write arbitrary files to the container filesystem, and retrieve information about the Redis database. Given the configuration of the sandboxed container that the Redis instance runs in, a remote attacker would be unable to execute remote code or abuse the integrity of the Cisco IOS XR Software host system.
References
psirt@cisco.comhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-redis-ABJyE5xKVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-redis-ABJyE5xKVendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-20821US Government Resource
Impacted products
Vendor Product Version
cisco ios_xr -
cisco 8201 -
cisco 8202 -
cisco 8208 -
cisco 8212 -
cisco 8218 -
cisco ncs-55a1-24h -
cisco ncs-55a1-24q6h-s -
cisco ncs-55a1-36h-s -
cisco ncs-55a1-36h-se -
cisco ncs-55a1-36h-se-s -
cisco ncs-55a2-mod-hd-s -
cisco ncs-55a2-mod-hx-s -
cisco ncs-55a2-mod-s -
cisco ncs-55a2-mod-se-h-s -
cisco ncs-55a2-mod-se-s -
cisco ncs_1001 -
cisco ncs_1002 -
cisco ncs_1004 -
cisco ncs_5001 -
cisco ncs_5002 -
cisco ncs_5501-se -
cisco ncs_5502-se -
cisco ncs_5504 -
cisco ncs_5508 -
cisco ncs_5516 -
cisco ncs_55a1 -
cisco ncs_55a2 -
To clipboard 

{
  "cisaActionDue": "2022-06-13",
  "cisaExploitAdd": "2022-05-23",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Cisco IOS XR Open Port Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:cisco:ios_xr:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "92587AA0-BDB6-4594-8F14-DC2A91FA4CD6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:cisco:8201:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "3D8E7FFF-82A8-4ECB-BA0C-CBF0C2FDA3A3",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:8202:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "87DC4C2F-01C5-4D89-8D79-E5D28EDAD0F2",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:8208:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "A34DAD43-0C95-4830-8078-EFE3E6C0A930",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:8212:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "46F5CBF0-7F55-44C0-B321-896BDBA22679",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:8218:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "D381E343-416F-42AF-A780-D330954F238F",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs-55a1-24h:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "D8D61548-61B4-4B53-8574-9DB92B00A627",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs-55a1-24q6h-s:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "74C8E3C6-282B-4394-A077-DF8694F7E55D",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs-55a1-36h-s:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "4FF08FAF-67DD-4361-947A-40D5938DB8BA",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs-55a1-36h-se:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "1CE2AD36-5D52-4489-AAC1-A7AC1B3D2581",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs-55a1-36h-se-s:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "14E948CF-9891-4AC8-8734-9C121B611722",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs-55a2-mod-hd-s:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "A95FEA95-703B-44E0-A7CA-9E38B2EB1980",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs-55a2-mod-hx-s:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "2D37BF94-9D5F-4A88-8115-3A88FF144845",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs-55a2-mod-s:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "C33F0D81-1314-440B-9FC2-56D76CA4CD79",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs-55a2-mod-se-h-s:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "8E50806D-115D-4903-A5B2-62654FFDD9F5",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs-55a2-mod-se-s:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "15AE071E-0CEF-4305-A92D-9F4C324BD4ED",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_1001:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "0F6E0FBE-70B7-413C-8943-39BEFE050298",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_1002:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "37AE5FB0-D9A6-4EBE-9F7F-243299AE918B",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_1004:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "60C9AAF8-4C5B-4EF5-B575-8235F3C54BCC",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_5001:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "E2A8C028-107B-4410-BCC6-5BCB8DB63603",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_5002:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "DA13FE67-F4AE-46DF-921B-3FB91BDF742B",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_5501-se:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "1B254955-C485-45D7-A19B-E78CE1D997AD",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_5502-se:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "50C7B71A-2559-4E90-BAAA-C6FAAFE35FC3",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_5504:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "6AC4E089-296D-4C19-BF21-DDF2501DD77C",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_5508:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "43D21B01-A754-474F-8E46-14D733AB307E",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_5516:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "17D6424C-972F-459C-B8F7-04FFD9F541BC",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_55a1:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "B51897CC-4FBF-4C99-BB69-2C528E392FE7",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:ncs_55a2:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "63ED034E-5A46-44A8-9101-8ACD6D334FF5",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the health check RPM of Cisco IOS XR Software could allow an unauthenticated, remote attacker to access the Redis instance that is running within the NOSi container. This vulnerability exists because the health check RPM opens TCP port 6379 by default upon activation. An attacker could exploit this vulnerability by connecting to the Redis instance on the open port. A successful exploit could allow the attacker to write to the Redis in-memory database, write arbitrary files to the container filesystem, and retrieve information about the Redis database. Given the configuration of the sandboxed container that the Redis instance runs in, a remote attacker would be unable to execute remote code or abuse the integrity of the Cisco IOS XR Software host system."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en el RPM de comprobaci\u00f3n de salud del software Cisco IOS XR podr\u00eda permitir a un atacante remoto no autenticado acceder a la instancia de Redis que es ejecutado dentro del contenedor NOSi. Esta vulnerabilidad se presenta porque el RPM de comprobaci\u00f3n de salud abre el puerto TCP 6379 por defecto al activarse. Un atacante podr\u00eda explotar esta vulnerabilidad al conectarse a la instancia de Redis en el puerto abierto. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante escribir en la base de datos en memoria de Redis, escribir archivos arbitrarios en el sistema de archivos del contenedor y recuperar informaci\u00f3n sobre la base de datos de Redis. Dada la configuraci\u00f3n del contenedor con sandbox en el que es ejecutada la instancia de Redis, un atacante remoto no podr\u00eda ejecutar c\u00f3digo remoto ni abusar de la integridad del sistema anfitri\u00f3n del software Cisco IOS XR"
    }
  ],
  "id": "CVE-2022-20821",
  "lastModified": "2025-10-28T13:59:06.040",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 6.4,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2022-05-26T14:15:08.123",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-redis-ABJyE5xK"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-redis-ABJyE5xK"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-20821"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.